CN102518152A - Test device simulating bridge pile foundation under bidirectional cyclic load effect - Google Patents
Test device simulating bridge pile foundation under bidirectional cyclic load effect Download PDFInfo
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- CN102518152A CN102518152A CN2011103667691A CN201110366769A CN102518152A CN 102518152 A CN102518152 A CN 102518152A CN 2011103667691 A CN2011103667691 A CN 2011103667691A CN 201110366769 A CN201110366769 A CN 201110366769A CN 102518152 A CN102518152 A CN 102518152A
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Abstract
The invention relates to a test device simulating a bridge pile foundation under a bidirectional cyclic load effect. The device comprises a bearing frame, a model tank, a model pile, a vertical loading frame, a vertical loading beam, a vertical loading actuator and a horizontal loading actuator, wherein the model tank is mounted in the bearing frame; the model pile is arranged in the model tank; the vertical loading frame is connected to the upper end of the bearing frame; the vertical loading beam is connected to the vertical loading frame; one end of the vertical loading actuator is fixed on the vertical loading beam, and the other end is vertically aligned with the model pile; and one end of the horizontal loading actuator is fixed on the vertical loading frame, and the other end is horizontally aligned with the model pile. Compared with the prior art, the test device provided by the invention has the advantages of wide application range, high simulation precision and the like.
Description
Technical field
The present invention relates to a kind of model testing charger, especially relate to a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating.
Background technology
Along with maintaining sustained and rapid growth of Chinese national economy, more and more traffic engineering are built successively, comprise speedway, high-speed railway and stride river, bridge spanning the sea etc.In these engineerings, superstructure will be born wind, wave, traffic etc. and have periodic cyclic loading in the runtime, and therefore, pile foundation also will be born the cyclic loading of certain amplitude for a long time except the dead load that will bear superstructure deadweight generation.
To the high-speed transit bridge pile foundation; Facing two problems needs to solve: the one, and the dynamic characteristics problem of pile foundation under the high speed load action; Like moving bearing capacity, the vertical accumulation displacement of stake top, stake top vibration displacement amplitude and dynamic stiffness etc. at the weak soil king-pile; This is not only the needs that bridge pile foundation antidetonation bearing capacity is estimated, and also is simultaneously the needs of estimating vehicle gap bridge comfortableness problem; The 2nd, the settlement issues of bridge pile foundation, the sedimentation after especially being open to traffic comprises the sedimentation that causes under sedimentation that Dynamic Loads of Vehicle causes and the dead load long term, is the long-term ride comfort that guarantees vehicle operating, is necessary to the sedimentation research of bridge pile foundation.These two the name of the games are pile foundation carrying and deformation characteristic problems under the axial circulation load.
Bridge pile foundation also receives because the horizontal cyclic effect of environmental loads such as wave, wind-force except that the axial circulation load that produced by traffic loading.Relation between the following soil of horizontal cyclic load action is more intricate; Stake is produced and the visibly different action effect of short-term static load: 1. under the cyclic loading effect; The horizontal movement of stake has bigger increase, and when the horizontal movement of stake increased, the horizontal foundation coefficient of soil reduced; Horizontal bearing capacity reduces, and it reduces and factors such as the degree that reduces and soil property, cycle-index have bigger relation.2. the reciprocal load stake soil series down generation ruckbildung of uniting is promptly after horizontal movement acquires a certain degree, along with the increase earth resistance of displacement reduces gradually.3. for the stake of bearing cyclic loadings such as wave, because the increase of load cycle-index and accumulation residual deformation, the concussion that can produce stake when distortion when stablizing destroys.
To axially and level under the cyclic loading effect; Pile foundation is carried and the research of deformation characteristic has become the difficult point problem that civil engineering construction needs to be resolved hurrily; Yet also lack the practical and effective analytical method at present both at home and abroad; Analysis to this type of problem normally relies on the engineering experience estimation, has very big blindness.For remedying the limitation of theory analysis, for important engineering, need to combine indoor model test to analyze, key technology wherein is how to simulate pile foundation to receive axially and the effect of level to two-way cyclic loading, and finds the report about this problem at present as yet.
Summary of the invention
The object of the invention is exactly that a kind of applied widely, experimental rig that simulation bridge pile foundation plinth that simulation precision is high receives two-way cyclic loading effect is provided in order to overcome the defective that above-mentioned prior art exists.
The object of the invention can be realized through following technical scheme:
A kind ofly simulate the experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect, it is characterized in that, comprising:
Bearing frame;
The model groove, this model groove is installed in bearing frame inside;
Model Pile, this Model Pile are located in the model groove;
Vertical loading frame, this vertical loading frame are connected the bearing frame upper end;
Vertical loading crossbeam, this vertical loading crossbeam is connected on the vertical loading frame;
Vertical loading actuator, this vertical loading actuator one end is fixed on the vertical loading crossbeam other end perpendicular alignmnet Model Pile;
Level is to loading actuator, and this level is fixed on the vertical loading frame other end horizontal aligument Model Pile to loading actuator one end.
Described model groove comprises channel-section steel skeleton, organic glass and reinforcing angle, and the four sides all around of described channel-section steel skeleton is through the organic glass sealing, and described reinforcing angle is arranged on the middle part of channel-section steel skeleton.
Described bearing frame is welded by steel.
Described bearing frame is provided with dismountable brace summer.
Respectively be provided with the screw of the vertical loading crossbeam of two row's scalable height on described vertical loading frame two side wing edges.
Described vertical loading frame one end is provided with stepless fine setting hole slot.
Described level is regulated height to loading actuator along the stepless fine setting hole slot on the vertical loading frame, and through bolt locking.
Described vertical loading actuator is adjusted to the optional position and passes through bolt locking along vertical loading crossbeam.
Compared with prior art, the present invention has the following advantages:
Applied widely, simulation precision is high, has broken through existing experimental rig and has carried out the restriction to CYCLIC LOADING of vertical and level, can simulate the combination loading condition of multiple load, and the position of actuator is adjustable arbitrarily, can be good at the deployment scenarios of adaptive model stake.
Description of drawings
Fig. 1 is a main TV structure sketch map of the present invention;
Fig. 2 is a test structure sketch map of the present invention;
Fig. 3 is a plan structure sketch map of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
The present invention simulates the bridge pile foundation plinth and receives the experimental rig of two-way cyclic loading effect to comprise that bearing frame 1, channel-section steel skeleton 2, organic glass 3, vertical loading frame 4, screw 5, bolt 6, stepless fine setting hole slot 7, vertical loading crossbeam 8, level load actuator 9, vertical loading actuator 10, Model Pile 11, brace summer 12 like Fig. 1-3.The model groove is made up of channel-section steel skeleton 2 and organic glass 3, and in model groove middle part reinforcing angle 13 is set, and uses organic glass 3 can make things convenient for the displacement situation of the soil body and stake in the viewing test; Model groove and the processing of bearing frame independent design, the model groove can push bearing frame 1 by an end; Vertical loading frame 4 can be fixed on the top channel-section steel of bearing frame 1 through bolt 6, and the position can be regulated arbitrarily; Vertical loading frame 4 is provided with and is uniformly distributed with screw 5, and vertical loading crossbeam 8 is connected on the vertical loading frame 4 through bolt, regulates the height of vertical loading crossbeam 8 through connecting different screws; Vertical loading frame 4 is provided with the hole slot 7 of certain-length near an end of model groove, and level can be carried out stepless fine setting through hole slot 7 to the height that loads actuator 9; Vertical loading actuator 10 is connected through bolt 6 with vertical loading crossbeam 8, and the position is adjustable arbitrarily.
Shown in Fig. 1-3, the model flute length is 1200mm, and height is 1200mm, and wide is 800mm, is made up of channel-section steel skeleton 2 and organic glass 3; And reinforcing angle 13 is set in model groove middle part, and width is 75mm, and thickness is 5mm, and organic glass 3 thickness are 10mm; Be convenient to observe soil internal displacement, bearing frame 1 length is 1800mm, and height is 2570mm, and wide is 1300mm; Be welded by channel-section steel and i iron, the brace summer 12 on it and bearing frame 1 are connected through bolt, dismantle easyly, push the bearing frame 1 from an end with the implementation model groove; Vertical loading frame 4 is two blocks of webs and two shaped steel that the edge of a wing is formed, and flange width is 100mm, and thickness is 10mm, and web width is 100mm; Thickness is 10mm, highly is 1250mm, can be fixed on the top channel-section steel of bearing frame 1 through bolt 6, and the position can be regulated arbitrarily along the channel-section steel length direction; Each equidistance of both sides, the edge of a wing of vertical loading frame 4 is provided with 15 screws 5, and vertical loading crossbeam 8 is a H shaped steel, and flange width is 100mm, and thickness is 10mm; Web width is 100mm, and web thickness is 10mm, is connected on the vertical loading frame 4 through bolt, connects the height that different screws 5 is regulated vertical loading crossbeam 8; Vertical loading frame 4 is near an end of model groove; Be provided with stepless fine setting hole slot 7; Stepless fine setting hole slot 7 length are 150mm, and wide is 50mm, and level can be passed stepless fine setting hole slot 7 to the loading termination and the linking beam that load actuator 9; Height can carry out stepless fine setting through stepless fine setting hole slot 7, and passes through bolt; Vertical loading actuator 10 is connected through bolt 6 with vertical loading crossbeam 8, and the position is adjustable arbitrarily.Adjust vertical loading frame 4, vertical loading crossbeam 8, level to the position that loads actuator 9 and vertical loading actuator 10; The actuator loading end is linked to each other with pile cover; Through the behavior of outer computer control loaded actuator, can realize CYCLIC LOADING model testing to pile cover.
The course of work of this device: the soil body is used in the filling test in the model groove, and embedding test model stake in the soil body can be carried out the half module or the full mould test of single pile, a clump of piles; Adjust the position of vertical loading frame 4, make itself and pile cover center coplane, and be fixed on the bearing frame 1; Adjust the height of vertical loading crossbeam 8, be fixed on the vertical loading frame 4, adjust the position of vertical loading actuator 10; Make its lower end aligned pile cover center, the upper end is fixed on the vertical loading crossbeam 8; Level, makes it satisfy loading position and meets the demands through stepless its height of fine setting hole slot 7 fine settings to loading actuator 9 and being fixed on the vertical loading frame 4; Through outer computer control, can realize multiple load composite conditions such as two-way CYCLIC LOADING to stake, but and the instant recording load condition, comprise load frequency, size, waveform etc.; Can collect data through measurement mechanism, the carrying of analytical model stake and deformation characteristic, and the displacement situation of pile peripheral earth generation.
Claims (8)
1. simulate the experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect for one kind, it is characterized in that, comprising:
Bearing frame;
The model groove, this model groove is installed in bearing frame inside;
Model Pile, this Model Pile are located in the model groove;
Vertical loading frame, this vertical loading frame are connected the bearing frame upper end;
Vertical loading crossbeam, this vertical loading crossbeam is connected on the vertical loading frame;
Vertical loading actuator, this vertical loading actuator one end is fixed on the vertical loading crossbeam other end perpendicular alignmnet Model Pile;
Level is to loading actuator, and this level is fixed on the vertical loading frame other end horizontal aligument Model Pile to loading actuator one end.
2. a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating according to claim 1; It is characterized in that; Described model groove comprises channel-section steel skeleton, organic glass and reinforcing angle; The four sides all around of described channel-section steel skeleton is through the organic glass sealing, and described reinforcing angle is arranged on the middle part of channel-section steel skeleton.
3. a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating according to claim 1 is characterized in that described bearing frame is welded by steel.
4. a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating according to claim 1 is characterized in that described bearing frame is provided with dismountable brace summer.
5. a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating according to claim 1 is characterized in that, respectively is provided with the screw of the vertical loading crossbeam of two row's scalable height on described vertical loading frame two side wing edges.
6. a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating according to claim 1 is characterized in that, described vertical loading frame one end is provided with stepless fine setting hole slot.
7. a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating according to claim 6 is characterized in that, described level is regulated height to loading actuator along the stepless fine setting hole slot on the vertical loading frame, and through bolt locking.
8. a kind of experimental rig that the bridge pile foundation plinth receives two-way cyclic loading effect of simulating according to claim 1 is characterized in that, described vertical loading actuator is adjusted to the optional position and passes through bolt locking along vertical loading crossbeam.
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| CN2011103667691A CN102518152A (en) | 2011-11-18 | 2011-11-18 | Test device simulating bridge pile foundation under bidirectional cyclic load effect |
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| CN2011103667691A CN102518152A (en) | 2011-11-18 | 2011-11-18 | Test device simulating bridge pile foundation under bidirectional cyclic load effect |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031861A (en) * | 2012-12-31 | 2013-04-10 | 同济大学 | Test device for simulating six-direction load action on raft of raft base |
| CN103374931A (en) * | 2012-04-25 | 2013-10-30 | 同济大学 | Test device for simulating wind power base affected by three-way coupling loads |
| CN103758159A (en) * | 2014-01-02 | 2014-04-30 | 河南科技大学 | Model pile foundation load simulation experimental device |
| CN103835322A (en) * | 2014-03-17 | 2014-06-04 | 太原理工大学 | Vertical and horizontal pipe pile loading device |
| CN103898929A (en) * | 2014-04-10 | 2014-07-02 | 山东电力工程咨询院有限公司 | Horizontal bearing characteristics test model for prestressed concrete pipe piles and data testing method |
| CN104002376A (en) * | 2014-06-16 | 2014-08-27 | 山东科技大学 | Manufacturing formwork of single-pile foundation test model |
| CN104480978A (en) * | 2014-12-09 | 2015-04-01 | 长安大学 | Test device for simulating vertical and transverse bearing characteristics of pile foundation on basis of geotechnical centrifuge |
| CN105067212A (en) * | 2015-09-19 | 2015-11-18 | 福州大学 | Pile head fixed end pile-soil dynamic interaction vibration table test device and construction method thereof |
| CN107340380A (en) * | 2017-07-10 | 2017-11-10 | 武汉科技大学 | Goaf simulation test device for stability under a kind of mechanical execution load action |
| CN109826246A (en) * | 2019-01-08 | 2019-05-31 | 东南大学 | One kind intending bidirectional circulating load loading device and test method for Model Pile |
| CN112461564A (en) * | 2020-11-16 | 2021-03-09 | 山东大学 | Offshore wind power foundation model test system and method |
| CN113418667A (en) * | 2021-06-01 | 2021-09-21 | 东风柳州汽车有限公司 | Auxiliary loading device |
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| US6142710A (en) * | 1999-07-12 | 2000-11-07 | Holland, Jr.; Thomas Edward | Apparatus and method for raising a foundation |
| CN2809020Y (en) * | 2005-06-28 | 2006-08-23 | 中国矿业大学(北京) | Simulation test system for underground engineering |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374931B (en) * | 2012-04-25 | 2015-06-03 | 同济大学 | Test device for simulating wind power base affected by three-way coupling loads |
| CN103374931A (en) * | 2012-04-25 | 2013-10-30 | 同济大学 | Test device for simulating wind power base affected by three-way coupling loads |
| CN103031861A (en) * | 2012-12-31 | 2013-04-10 | 同济大学 | Test device for simulating six-direction load action on raft of raft base |
| CN103031861B (en) * | 2012-12-31 | 2014-12-10 | 同济大学 | Test device for simulating six-direction load action on raft of raft base |
| CN103758159A (en) * | 2014-01-02 | 2014-04-30 | 河南科技大学 | Model pile foundation load simulation experimental device |
| CN103758159B (en) * | 2014-01-02 | 2015-08-12 | 河南科技大学 | A kind of model pile foundation load simulation experimental device |
| CN103835322A (en) * | 2014-03-17 | 2014-06-04 | 太原理工大学 | Vertical and horizontal pipe pile loading device |
| CN103898929A (en) * | 2014-04-10 | 2014-07-02 | 山东电力工程咨询院有限公司 | Horizontal bearing characteristics test model for prestressed concrete pipe piles and data testing method |
| CN103898929B (en) * | 2014-04-10 | 2016-05-18 | 山东电力工程咨询院有限公司 | Prestressed concrete pipe pile horizontal bearing attribute testing model and data test method |
| CN104002376A (en) * | 2014-06-16 | 2014-08-27 | 山东科技大学 | Manufacturing formwork of single-pile foundation test model |
| CN104480978A (en) * | 2014-12-09 | 2015-04-01 | 长安大学 | Test device for simulating vertical and transverse bearing characteristics of pile foundation on basis of geotechnical centrifuge |
| CN104480978B (en) * | 2014-12-09 | 2016-03-30 | 长安大学 | The experimental rig of pile foundation vertical and lateral bearing characteristic is simulated based on geotechnical centrifuge |
| CN105067212A (en) * | 2015-09-19 | 2015-11-18 | 福州大学 | Pile head fixed end pile-soil dynamic interaction vibration table test device and construction method thereof |
| CN107340380A (en) * | 2017-07-10 | 2017-11-10 | 武汉科技大学 | Goaf simulation test device for stability under a kind of mechanical execution load action |
| CN109826246A (en) * | 2019-01-08 | 2019-05-31 | 东南大学 | One kind intending bidirectional circulating load loading device and test method for Model Pile |
| CN112461564A (en) * | 2020-11-16 | 2021-03-09 | 山东大学 | Offshore wind power foundation model test system and method |
| CN113418667A (en) * | 2021-06-01 | 2021-09-21 | 东风柳州汽车有限公司 | Auxiliary loading device |
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Application publication date: 20120627 |